In its latest climate summary, NOAA reported Friday:
The first nine months of 2010 tied with the same period in 1998 for the warmest combined land and ocean surface temperature on record. The global average land surface temperature for January-September was the second warmest on record, behind 2007. The global ocean surface temperature for January-September was also the second warmest on record, behind 1998.
Coinciding with the global warmth, Arctic sea ice reached its the third lowest extent on record (30.4 percent below average) in September. On the other side of the globe, Antarctic sea ice - which has been more stable than Arctic sea ice - thickened to its third highest extent on record (2.3 percent above average).
NOAA's summary also provided an update on La Nina -- which strengthened from weak to moderate during September. As we have already discussed, global temperatures typically cool during La Nina so it's unlikely the last three months of 2010 will sustain the record warmth, notwithstanding the fact the warmth "stubbornly refused" to relent in September.
See also this video update from Climate Central on La Nina and current temperature trends.